@Harv Yergin IV My rentals are as high tech as they get ( video doorbells, smart thermostats, water leak detection etc.,) but smart locks weren't good ROI for me. 

Does a 9 year electric water heater last longer then a 6 yr?

My family currently rents a 950 sq ft apartment and honestly, I'm just sick of barely scraping by so I'm going to stop treading water and begin doing something!

We are looking at a 30-unit built in the 1960's, and the current building is set up with two oil boilers, one for the hot water, and one for radiator heat.

Don't forget to account for vacancy, repairs, capital expenditures, property management (even if you self-manage, there will likely come a time when you don't want to), and water/sewer (if you pay for them). 

When it comes to a group of trailers aka mobile homes the big thing I see is waste water and sewage .

These folks have caused a water damage and downstair roof has crashed down in the washer/dryer room.

I do not have the means to address homelessness on city wide basis.I think I would try it on these initial few tents and if anyone else moves back to the same location in the next 6 months, I would look for a different solution.Good luck.Of course, word could get out and you'd have two dozen tents there tomorrow morning. we built a small 27 home community off of Palmblad and the springwater trail there was so infested with these folks as to the point people could not use it.I went to test drive a new tesla and they were just being kicked out of their parking lot off of Mccadam.. 

When dealing with a shady handyman, that's like blood in the water for sharks.In the future, you can best prevent this by not waiting till the last minute to take care of such repairs. 

Since the rental market doesn't pick up until the spring, at least we have some time to weigh our options.